Hey! Here's some screenshots that could help!
The water crane should be here \|/ :
And you get to that place by going up this ramp \|/ :
If it isn't there, yet you are in that spot, try going here \|/ in the Northern Slurries:
And the camp in the previous photo, should be here \|/ (The entrance to the Northern Slurries should be the rails leading into the picture from the bottom.)
Hope this helps! :0)